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Test: Metals & Non-metals - UPSC MCQ


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20 Questions MCQ Test Science & Technology for UPSC CSE - Test: Metals & Non-metals

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Test: Metals & Non-metals - Question 1

Which of the following non-metal is good conductor of electricity?

Detailed Solution for Test: Metals & Non-metals - Question 1

Carbon, in the form of Graphite is a good conductor of electricity. It conducts heat and electricity like a metal or a metalloid.

Test: Metals & Non-metals - Question 2

By which reaction metal is obtained from metal oxide ?

Detailed Solution for Test: Metals & Non-metals - Question 2
The method used to extract metals from the ore in which they are found depends on their reactivity. For example, reactive metals such as aluminium are extracted by electrolysis, while a less-reactive metal such as iron may be extracted by reduction with carbon or carbon monoxide.
Test: Metals & Non-metals - Question 3

Which non-metallic element is in liquid form ? 

Detailed Solution for Test: Metals & Non-metals - Question 3

The metal which exist as a liquid at room temperature is mercury. Non - metal which exist as a liquid at room temperature is bromine. 

Test: Metals & Non-metals - Question 4

Which one of the following metal reacts vigorously with oxygen and water?

Detailed Solution for Test: Metals & Non-metals - Question 4

Sodium is known for its vigorous reaction with both oxygen and water. Reacts quickly with oxygen to form sodium oxide, often resulting in a bright, intense flame. In contact with water, it produces sodium hydroxide and hydrogen gas, often causing an explosive reaction. This high reactivity is due to its position in the periodic table, where it is eager to lose its single valence electron.

Test: Metals & Non-metals - Question 5

Which metal is present in Calcium Hydroxide?

Detailed Solution for Test: Metals & Non-metals - Question 5

Calcium Hydroxide is a compound with the formula Ca(OH)2. The metal present in Calcium Hydroxide is Calcium (Ca).

Test: Metals & Non-metals - Question 6

The property of metals by which they can be beaten in to thin sheets is called-

Detailed Solution for Test: Metals & Non-metals - Question 6

Malleability: The property of metals by which they can be beaten into thin sheets is known as malleability.
For example, silver metal is beaten to make silver foil used for decorating sweets.

Test: Metals & Non-metals - Question 7

Which of the following metals is extracted only by electrolysis?

Detailed Solution for Test: Metals & Non-metals - Question 7

The method used to extract metals from their ores depends on their reactivity.

For instance:

  • Reactive metals, like aluminium, are extracted through electrolysis.
  • Less reactive metals, such as iron, can be extracted by reduction using carbon or carbon monoxide.

Thus, the extraction method varies significantly based on the metal's position in the reactivity series.

Test: Metals & Non-metals - Question 8

The property of metal by which it can be drawn into wires is called

Detailed Solution for Test: Metals & Non-metals - Question 8

 

The ability of a metal to be drawn into wires is known as ductility. This property allows metals to be stretched into thin wires without breaking.

  • Ductility is a crucial property for materials that need to be formed into long, thin shapes.
  • Metals like copper and aluminium are highly ductile and commonly used to make electrical wires.
  • This property is different from malleability, which refers to a metal's ability to be hammered into sheets.

 

Test: Metals & Non-metals - Question 9

Which of the following metals will not react with oxygen, even when heated very strongly in air?

Detailed Solution for Test: Metals & Non-metals - Question 9

Silver (Ag) is a noble metal. It does not react with oxygen, even at high temperatures. This is because it is highly resistant to oxidation.

Test: Metals & Non-metals - Question 10

Aluminium is commonly used for making cooking utensils. What properties of aluminium make it suitable for this purpose?

(i) Good thermal conductivity

(ii) Good electrical conductivity

(iii) Ductility

(iv) High melting point

Detailed Solution for Test: Metals & Non-metals - Question 10

(d) (i) and (iv)

Explanation: Aluminium is not suitable for utensil production due to its ductility and high electrical conductivity. The properties that make it suitable are its high melting point and good heat conductivity. Copper, steel (an alloy of iron), and aluminium are the most common metals used for making utensils because of their good heat conductivity.

Test: Metals & Non-metals - Question 11

Metal A when dipped in solution of salt of metal B, then metal B is displaced this shows that

Detailed Solution for Test: Metals & Non-metals - Question 11

When metal A is dipped in a solution of salt of metal V, then metal B is displaced, this shows that metal A is more reactive than B. Only then it can displace B from its salt solution. 

Test: Metals & Non-metals - Question 12

An iron nail is dipped in copper sulphate solution. It is observed that

Detailed Solution for Test: Metals & Non-metals - Question 12

When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore, copper sulphate solution colour changes from blue to light green .

Test: Metals & Non-metals - Question 13

A non-metallic oxide which is neutral in nature is

Detailed Solution for Test: Metals & Non-metals - Question 13

Non - metals generally form acidic oxides but oxides of carbon and nitrogen are neutral in nature like CO and NO.

Test: Metals & Non-metals - Question 14

The non-metal which is a liquid at room temperature–

Detailed Solution for Test: Metals & Non-metals - Question 14

The non-metal that is a liquid at room temperature is bromine.

  • Bromine is unique among non-metals for being a liquid at room temperature.
  • It appears as a reddish-brown liquid.
  • It is commonly used in industries for making flame retardants.
Test: Metals & Non-metals - Question 15

Non-metal generally form –

Detailed Solution for Test: Metals & Non-metals - Question 15

A is the correct option.Metals lose electrons in bonding whilst non-metals gain electrons during ionic bonding hence metals form cations and non-metals form anions.

Test: Metals & Non-metals - Question 16

Which is the least conductor of heat –

Detailed Solution for Test: Metals & Non-metals - Question 16

Lead being metal is a bad conductor of electricity and heat. Compared to other metals, lead is a poor conductor of heat while gold, silver, platinum are good conductors of heat.

Test: Metals & Non-metals - Question 17

Which of the following metal can we cut with the knife –

Detailed Solution for Test: Metals & Non-metals - Question 17

The metal potassium can be cut with a knife due to its relatively weak metallic bonds.

  • Metals like sodium and potassium have a lot of empty space in their atomic structure.
  • This results in weaker bonds, making these metals soft and easy to cut.
Test: Metals & Non-metals - Question 18

Which of the following metal react vigorously with oxygen–

Detailed Solution for Test: Metals & Non-metals - Question 18

Some metals react vigorously with oxygen. Here's a concise explanation:

  • Sodium is highly reactive with oxygen. It reacts quickly and can catch fire in air.
  • Other metals like magnesium and aluminium also react, but not as vigorously as sodium.
  • Zinc reacts slowly with oxygen, forming a protective layer that prevents further reaction.
Test: Metals & Non-metals - Question 19

Which metal is used for making foils used in packing of food materials –

Detailed Solution for Test: Metals & Non-metals - Question 19

The metal commonly used for making foils in food packaging is aluminium. Here are some reasons why aluminium is preferred:

  • Lightweight: Aluminium is easy to handle and transport.
  • Non-toxic: Safe for food contact, maintaining the quality of food.
  • Barrier properties: Protects food from light, oxygen, and moisture.
  • Malleable: Can be easily shaped into thin sheets.

These properties make aluminium an ideal choice for food packaging.

Test: Metals & Non-metals - Question 20

The most abundant metal in the earth crust is –

Detailed Solution for Test: Metals & Non-metals - Question 20

The most abundant element in the Earth's crust is oxygen, followed by silicon. However, these are both non-metals. The most abundant metal is aluminium, which makes up about 8.23% of the crust. Aluminium is followed by iron.

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